Do the concentrations need the same unit?

Yes — keep C₁ and C₂ in the same unit (e.g. both µg/mL). Volumes share the same rule (both mL).

How do I dilute a peptide stock to a working concentration?

Put your stock concentration in C₁, your stock volume in V₁ (often 1 mL), your working concentration in C₂ — V₂ tells you the final volume to bring it to with bacteriostatic water.

C₁V₁ = C₂V₂ lab math

Laboratory Tools

Dilution Calculator

Solve stock-concentration dilution problems for laboratory solutions using the standard C₁V₁ = C₂V₂ equation.

C₁V₁ = C₂V₂, solved.

Standard lab dilution math. Enter any three of stock concentration, stock volume, target concentration and final volume — the fourth is computed instantly.

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Solved value

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How it works

The equation

Conservation of solute

C₁V₁ = C₂V₂

Diluting a stock does not change the amount of dissolved material — concentration times volume stays constant. Any of the four variables can be isolated algebraically.

Arithmetic only — for laboratory research use.

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